SE84142 is an integrated power switch supporting boost/buck/buck-boost DC-DC LED driver chip, with a wide input voltage range of 3V to 60V, integrated soft start, thereby minimizing external surge suppression components The demand makes it an ideal choice for LED drivers with a wide input power range. The output current can be adjusted by an external sampling resistor.
SE84142 has an integrated 350mΩ power switch, which can provide at least 1.5A input peak current capability, and has excellent load and line transient response. With SKIP control mode, it combines low quiescent current with high switching frequency to achieve high efficiency in a wide range of load currents. Additional features include: soft start, thermal shutdown, UVLO under-voltage lockout, cycle-by-cycle current limit protection.
SE84142 can realize high-precision digital adjustment of output current by selecting sampling resistor RSence with different resistance values.
SE84142 supports PWM dimming of digital input (100HZ~25KHZ), no screen flicker under high frequency PWM input. The dimming ratio is as high as 1:25000 when the PWM frequency is 100HZ.